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Hace 5 días · Infobox references. Perfluorooctanoic acid ( PFOA; conjugate base perfluorooctanoate; also known colloquially as C8, for its 8-carbon chain structure) is a perfluorinated carboxylic acid produced and used worldwide as an industrial surfactant in chemical processes and as a material feedstock. PFOA is considered a surfactant, or fluorosurfactant ...
Hace 1 día · The "low percentage" solution ultimately led to the discovery of tetraethyllead (TEL) in December 1921, a product of the research of Midgley and Boyd and the defining component of leaded gasoline. This innovation started a cycle of improvements in fuel efficiency that coincided with the large-scale development of oil refining to provide more products in the boiling range of gasoline.
Hace 1 día · The BJP's total vote share stood at 37.4 per cent, an increase of over 6 percentage points from 31.34 per cent in 2014. The National Democratic Alliance secured a vote share of 45 per cent, compared to 38 per cent in 2014. In contrast, the vote share of Indian National Congress remained the same at 19.5 per cent.
Hace 1 día · The (red) and (blue) were the largest and second-largest empires in history, respectively. The precise extent of the Mongol Empire at its greatest territorial expansion is a matter of debate among scholars. Several empires in human history have been contenders for the largest of all time, depending on definition and mode of measurement.
Hace 1 día · *not held due to COVID-19 pandemic. Grand Slam tournaments. Djokovic has won an all-time record 24 Grand Slam titles and he is the only man to achieve a triple Career Grand Slam by winning each of the four majors at least three times.
Hace 3 días · An Edison Studios film showing immigrants arriving at Ellis Island in New York Harbor, a major point of entry for European immigrants in the late 19th and early 20th centuries. From 1865 through 1917 an unprecedented stream of immigrants arrived in the United States, including 24.4 million from Europe.
Hace 2 días · Wikimedia Foundation. The Wikimedia Foundation, Inc., abbreviated WMF, is an American 501 (c) (3) nonprofit organization headquartered in San Francisco, California, and registered there as a charitable foundation. [5] It is the host of Wikipedia, the seventh most visited website in the world. In addition, the foundation hosts 14 other related ...
